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Diffstat (limited to 'js/vendor/ev-emitter/ev-emitter.js')
-rw-r--r-- | js/vendor/ev-emitter/ev-emitter.js | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/js/vendor/ev-emitter/ev-emitter.js b/js/vendor/ev-emitter/ev-emitter.js new file mode 100644 index 000000000..212a978a8 --- /dev/null +++ b/js/vendor/ev-emitter/ev-emitter.js @@ -0,0 +1,109 @@ +/** + * EvEmitter v1.0.1 + * Lil' event emitter + * MIT License + */ + +/* jshint unused: true, undef: true, strict: true */ + +( function( global, factory ) { + // universal module definition + /* jshint strict: false */ /* globals define, module */ + if ( typeof define == 'function' && define.amd ) { + // AMD - RequireJS + define( factory ); + } else if ( typeof module == 'object' && module.exports ) { + // CommonJS - Browserify, Webpack + module.exports = factory(); + } else { + // Browser globals + global.EvEmitter = factory(); + } + +}( this, function() { + +"use strict"; + +function EvEmitter() {} + +var proto = EvEmitter.prototype; + +proto.on = function( eventName, listener ) { + if ( !eventName || !listener ) { + return; + } + // set events hash + var events = this._events = this._events || {}; + // set listeners array + var listeners = events[ eventName ] = events[ eventName ] || []; + // only add once + if ( listeners.indexOf( listener ) == -1 ) { + listeners.push( listener ); + } + + return this; +}; + +proto.once = function( eventName, listener ) { + if ( !eventName || !listener ) { + return; + } + // add event + this.on( eventName, listener ); + // set once flag + // set onceEvents hash + var onceEvents = this._onceEvents = this._onceEvents || {}; + // set onceListeners array + var onceListeners = onceEvents[ eventName ] = onceEvents[ eventName ] || []; + // set flag + onceListeners[ listener ] = true; + + return this; +}; + +proto.off = function( eventName, listener ) { + var listeners = this._events && this._events[ eventName ]; + if ( !listeners || !listeners.length ) { + return; + } + var index = listeners.indexOf( listener ); + if ( index != -1 ) { + listeners.splice( index, 1 ); + } + + return this; +}; + +proto.emitEvent = function( eventName, args ) { + var listeners = this._events && this._events[ eventName ]; + if ( !listeners || !listeners.length ) { + return; + } + var i = 0; + var listener = listeners[i]; + args = args || []; + // once stuff + var onceListeners = this._onceEvents && this._onceEvents[ eventName ]; + + while ( listener ) { + var isOnce = onceListeners && onceListeners[ listener ]; + if ( isOnce ) { + // remove listener + // remove before trigger to prevent recursion + this.off( eventName, listener ); + // unset once flag + delete onceListeners[ listener ]; + } + // trigger listener + listener.apply( this, args ); + // get next listener + i += isOnce ? 0 : 1; + listener = listeners[i]; + } + + return this; +}; + +return EvEmitter; + +})); |